Electric elevator



(Hommel.)

4 H. CLARK.

\ ELECTRIC BLEVATOR.

No'. 353,123. lPatented Nov. 23, 1886.

PGN;

UNITED STATES PATENT OFFICE.

JOHN H. CLARK, OF BOSTON, MASSACHUSETTS.

ELECTRIC ELEVATO R. v

SPECIFICATION forming part of Letters Patent No. 353,123, dated November 23, 1886.

Application filed August 12, i886.

This invention has for its object to provideV 4within the car, the said wheel revolving continuously during the movement of the car and operating the shipperrope outside the car. The power-controlling valve has also been operated by a rope passing through the car, the

latter arrangement being especially objectionf able on account of its unsightliness and on account of the power required to move it.

In accordance with my invention, I obviate the employment o1' a shipper rope passing through .the` car or about sheaves located outside the car, and control the operation of the power-valve by means of electricity, as will beV hereinafter pointed out.

The particular features of my invention will be hereinafter pointed out in the claim at the end of this specification.

The drawing, in section and elevation, shows an elevator and its actuatingcylinder provided with my improved electrical apparatus for operating the valve of said cylinder from within the car.

The car A is herein shown as suspended in the hoistway formed by the sides or walls a in a building or other structure by a rope or cable, a', having one end fastened, as at a2, to the said car.

The rope or roller a is passed about a sheave, a3, near the top of the building, and is extended down to near the bottom of the hoistway,wl1ere fall with the movement of the car.

Serial No. 210,703. (Ncmodehl v it is )assed about sheaves c* a su) orted in guides c, the said rope orcable having its end fastened to or near the sheave at. The sheave a* is` supported 'in stationary bearings, While the shaft or bearing of the sh cave ai' is movable, it traveling in the guides a". The shaft ofthe sheave c5 is connected to the piston-rod b of a piston, b', reciprocating in a cylinder, b2, herein shown as located in the basement of the building.

The cylinder b2, as herein shown, communi-r cates by a single passage or port, @with a7 valve-chest, c', provided Witha valve, c2, herein shown as auordinary slide-valve.

The yvalve cZ is provided with a valve-stem or rod, c, extended through the valve-chest c and supported; as shown, in an arm, o4, attached to the cylinder b2. The valve c2 is moved by electrical devices, hereiushown as magnets d d2.

The valve stem or rod cihas secured to itan iron plate, d, forming the armature for the electro-magnets d di on opposite sides of said armature, the magnet d being shown as secured to the valvechest c, and the magnet d2 to an extension, d, of the arm c4.

y The magnet d is included in circuit with a battery, B, the terminals of the said circuit being shown as a push-button, d, located in the car, and the magnet d2 is included in circuit With the battery B', having as its terminals a second push-button, di, also located in the car. The circuit-wires are carried from the magnets to near the center of the hoist- Way, and thence, after being passed through the side or wall a, the said wires are left of such length within the hoistw'ay as to rise and In the operation of the elevator as herein shown the car is sup posed to have been stopped at the first loor, D, the valve c2 being centeredthat is, with the passage c closed, as shown in the drawing, by means of a spring,f, on the valve-stem or rod, c3, both circuits at such time being opened. If it is desired to ascend, the operator will press the button d6, closing the circuit of the battery B, thus magnetizing the magnet d. The magnet d being magnet ized, attracts the armature d, moving the valve IOO l piston b toward the right, thus drawing the movable sheave (t5 away from the fixed sheave a* and elevating the car. During the ascent of the car the circuit of the magnet d is kept closed; but if it is desired to stop at any time in the ascent the operator will remove his finger from the button to break the circuit, and thus demagnetize the magnet d. vrIhe circuit being broken, the spring f centers the Valve, as shown in the drawing, closing the outlet for the water in the cylinder, thus stopping the movement of the piston b, and consequently stopping the elevator. If, now, it is desired to descend, the operator pushes the button d', closing the circuitof the battery B and magneti Zing the magnet d2. The magnet d2 being magnetized, attracts the armature d, moving the valvecl toward the left,thus opening the port c to the exhaust 7i through the recess h in the valve 0*. rIhe water in the cylinder is forced out in the present instance through the port c into the exhaust It by the weight of the car as the latter descends by gravity. If it is desired to stop on the downward passage ofthe car, the operator breaks the circuit ot' the battery B', whereupon the springf2 centers the armature,thus moving the valve into the position shown in the drawings, cutting off the port c from the exhaust h.

The cylinder b', instead of having only a single port or passage, c, at one end, may be ported at each end, in which case the laps of the valve c2 will be made long enough to cover the ports when the valve is on the center.

Instead of using the springs for centering the valve, I may employ a second set of magnets to operate upon a second armature, which might be an extension of the armature d, the said second set of magnets being also operated by suitable push-buttons or switches within the car.

I wish it to be understood that I do notlimit my invention to the particular class or style of elevator herein shown, as the said invention is applicable to any of the well-known styles or type of elevator.

I furthermore do not limit myself to the employment of a main valve, as it is evident that the valve might be an auxiliary valve and operate equally as well.

I have herein shown the car as provided with 5 push-buttons; but I do not limit myself to this form of switch, as any other switch might be used.

The method herein described whereby the opening and closing of the valve to admit wa- 5 ter or steam to the actuatingcylinder by electricity is, I believe, novel with me.

I do not herein broadly claim controlling elec trically from a distance the valve of an engine.

I claimf 6 An elevator-car and a motor mechanism provided with a valve to control the movement of the motor mechanism and effect the movement of the car, combined with switches upon the car, and electrical devices, substantially as de- 6 scribed, connected with the car and to the motor mechanism and cooperating with the valve of the said motor mechanism to effect from the said ear the movement of the valve of the motor mechanism at will, in one or the other direction, and by such movement effect the ascent or descent of this said car, substantially as and for the purpose set forth.

In testimony whereof I have signed myname to this specification in the presence of two sub- 7 scribing witnesses.

J OI-IN II. CLARK.

Vitnesses:

G. XV. GREGORY, C. M. GONE. 

